nsz Git - cparser/blob - ast2firm.c

   1 #include <config.h>
   2
   3 #define _GNU_SOURCE
   4
   5 #include <assert.h>
   6 #include <string.h>
   7 #include <stdbool.h>
   8
   9 #include <libfirm/firm.h>
  10 #include <libfirm/adt/obst.h>
  11
  12 #include "ast2firm.h"
  13
  14 #include "adt/error.h"
  15 #include "adt/array.h"
  16 #include "token_t.h"
  17 #include "type_t.h"
  18 #include "ast_t.h"
  19
  20 #define MAGIC_DEFAULT_PN_NUMBER     (long) -314159265
  21
  22 static ir_type *ir_type_const_char;
  23 static ir_type *ir_type_void;
  24 static ir_type *ir_type_int;
  25 static ir_type *ir_type_void_ptr;
  26
  27 static type_t *type_const_char;
  28 static type_t *type_void;
  29 static type_t *type_int;
  30
  31 static symbol_t *symbol_alloca;
  32
  33 static int       next_value_number_function;
  34 static ir_node  *continue_label;
  35 static ir_node  *break_label;
  36 static ir_node  *current_switch_cond;
  37 static bool      saw_default_label;
  38 static ir_node **imature_blocks;
  39
  40 static const declaration_t *current_function_decl;
  41 static ir_node             *current_function_name;
  42
  43 typedef enum declaration_type_t {
  44         DECLARATION_TYPE_UNKNOWN,
  45         DECLARATION_TYPE_FUNCTION,
  46         DECLARATION_TYPE_GLOBAL_VARIABLE,
  47         DECLARATION_TYPE_LOCAL_VARIABLE,
  48         DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
  49         DECLARATION_TYPE_COMPOUND_MEMBER,
  50         DECLARATION_TYPE_LABEL_BLOCK,
  51 } declaration_type_t;
  52
  53 static ir_type *get_ir_type(type_t *type);
  54
  55 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
  56 {
  57         (void) pos;
  58 #if 0
  59         const declaration_t *declaration = & value_numbers[pos]->declaration;
  60
  61         print_warning_prefix(declaration->source_position);
  62         fprintf(stderr, "variable '%s' might be used uninitialized\n",
  63                         declaration->symbol->string);
  64 #endif
  65         fprintf(stderr, "Some variable might be used uninitialized\n");
  66         return new_r_Unknown(irg, mode);
  67 }
  68
  69 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
  70 {
  71         const source_position_t *pos = (const source_position_t*) dbg;
  72         if(pos == NULL)
  73                 return 0;
  74         return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
  75                                    pos->linenr);
  76 }
  77
  78 const char *retrieve_dbg(const dbg_info *dbg, unsigned *line)
  79 {
  80         const source_position_t *pos = (const source_position_t*) dbg;
  81         if(pos == NULL)
  82                 return NULL;
  83         if(line != NULL)
  84                 *line = pos->linenr;
  85         return pos->input_name;
  86 }
  87
  88 void init_ast2firm(void)
  89 {
  90         type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
  91         type_void       = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
  92         type_int        = make_atomic_type(ATOMIC_TYPE_INT,  TYPE_QUALIFIER_NONE);
  93
  94         ir_type_int        = get_ir_type(type_int);
  95         ir_type_const_char = get_ir_type(type_const_char);
  96         ir_type_void       = get_ir_type(type_int); /* we don't have a real void
  97                                                        type in firm */
  98         ir_type_void_ptr   = new_type_pointer(new_id_from_str("void_ptr"),
  99                                               ir_type_void, mode_P_data);
 100
 101         type_void->firm_type = ir_type_void;
 102
 103         symbol_alloca = symbol_table_insert("__builtin_alloca");
 104 }
 105
 106 void exit_ast2firm(void)
 107 {
 108 }
 109
 110 static unsigned unique_id = 0;
 111
 112 static ident *unique_ident(const char *tag)
 113 {
 114         char buf[256];
 115
 116         snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
 117         unique_id++;
 118         return new_id_from_str(buf);
 119 }
 120
 121 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
 122 {
 123         switch(atomic_type->atype) {
 124         case ATOMIC_TYPE_SCHAR:
 125         case ATOMIC_TYPE_CHAR:
 126                 return mode_Bs;
 127         case ATOMIC_TYPE_UCHAR:
 128                 return mode_Bu;
 129         case ATOMIC_TYPE_SHORT:
 130                 return mode_Hs;
 131         case ATOMIC_TYPE_USHORT:
 132                 return mode_Hu;
 133         case ATOMIC_TYPE_LONG:
 134         case ATOMIC_TYPE_INT:
 135                 return mode_Is;
 136         case ATOMIC_TYPE_ULONG:
 137         case ATOMIC_TYPE_UINT:
 138                 return mode_Iu;
 139         case ATOMIC_TYPE_LONGLONG:
 140                 return mode_Ls;
 141         case ATOMIC_TYPE_ULONGLONG:
 142                 return mode_Lu;
 143         case ATOMIC_TYPE_FLOAT:
 144                 return mode_F;
 145         case ATOMIC_TYPE_DOUBLE:
 146                 return mode_D;
 147         case ATOMIC_TYPE_LONG_DOUBLE:
 148                 return mode_E;
 149         case ATOMIC_TYPE_BOOL:
 150                 return mode_b;
 151 #ifdef PROVIDE_COMPLEX
 152         case ATOMIC_TYPE_FLOAT_COMPLEX:
 153         case ATOMIC_TYPE_DOUBLE_COMPLEX:
 154         case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
 155                 panic("complex lowering not implemented yet");
 156                 break;
 157         case ATOMIC_TYPE_FLOAT_IMAGINARY:
 158         case ATOMIC_TYPE_DOUBLE_IMAGINARY:
 159         case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
 160                 panic("imaginary lowering not implemented yet");
 161                 break;
 162 #endif
 163         case ATOMIC_TYPE_VOID:
 164                 /* firm has no real void... */
 165                 return mode_Is;
 166         case ATOMIC_TYPE_INVALID:
 167                 break;
 168         }
 169         panic("Encountered unknown atomic type");
 170 }
 171
 172
 173 static unsigned get_type_size(type_t *type);
 174
 175 static unsigned get_atomic_type_size(const atomic_type_t *type)
 176 {
 177         switch(type->atype) {
 178         case ATOMIC_TYPE_CHAR:
 179         case ATOMIC_TYPE_SCHAR:
 180         case ATOMIC_TYPE_UCHAR:
 181                 return 1;
 182
 183         case ATOMIC_TYPE_SHORT:
 184         case ATOMIC_TYPE_USHORT:
 185                 return 2;
 186
 187         case ATOMIC_TYPE_BOOL:
 188         case ATOMIC_TYPE_INT:
 189         case ATOMIC_TYPE_UINT:
 190         case ATOMIC_TYPE_LONG:
 191         case ATOMIC_TYPE_ULONG:
 192         case ATOMIC_TYPE_FLOAT:
 193                 return 4;
 194
 195         case ATOMIC_TYPE_LONGLONG:
 196         case ATOMIC_TYPE_ULONGLONG:
 197         case ATOMIC_TYPE_DOUBLE:
 198                 return 8;
 199
 200         case ATOMIC_TYPE_LONG_DOUBLE:
 201                 return 12;
 202
 203         case ATOMIC_TYPE_VOID:
 204                 return 1;
 205
 206         case ATOMIC_TYPE_INVALID:
 207                 break;
 208         }
 209         panic("Trying to determine size of invalid atomic type");
 210 }
 211
 212 static unsigned get_compound_type_size(compound_type_t *type)
 213 {
 214         ir_type *irtype = get_ir_type(&type->type);
 215         return get_type_size_bytes(irtype);
 216 }
 217
 218 static unsigned get_array_type_size(array_type_t *type)
 219 {
 220         ir_type *irtype = get_ir_type(&type->type);
 221         return get_type_size_bytes(irtype);
 222 }
 223
 224 static unsigned get_type_size(type_t *type)
 225 {
 226         type = skip_typeref(type);
 227
 228         switch(type->type) {
 229         case TYPE_ATOMIC:
 230                 return get_atomic_type_size((const atomic_type_t*) type);
 231         case TYPE_ENUM:
 232                 return get_mode_size_bytes(mode_Is);
 233         case TYPE_COMPOUND_UNION:
 234         case TYPE_COMPOUND_STRUCT:
 235                 return get_compound_type_size((compound_type_t*) type);
 236         case TYPE_FUNCTION:
 237                 /* just a pointer to the function */
 238                 return get_mode_size_bytes(mode_P_code);
 239         case TYPE_POINTER:
 240                 return get_mode_size_bytes(mode_P_data);
 241         case TYPE_ARRAY:
 242                 return get_array_type_size((array_type_t*) type);
 243         case TYPE_BUILTIN:
 244         case TYPE_TYPEDEF:
 245         case TYPE_TYPEOF:
 246         case TYPE_INVALID:
 247                 break;
 248         }
 249         panic("Trying to determine size of invalid type");
 250 }
 251
 252 static unsigned count_parameters(const function_type_t *function_type)
 253 {
 254         unsigned count = 0;
 255
 256         function_parameter_t *parameter = function_type->parameters;
 257         for ( ; parameter != NULL; parameter = parameter->next) {
 258                 ++count;
 259         }
 260
 261         return count;
 262 }
 263
 264
 265
 266
 267 static long fold_constant(const expression_t *expression);
 268
 269 static ir_type *create_atomic_type(const atomic_type_t *type)
 270 {
 271         ir_mode *mode   = get_atomic_mode(type);
 272         ident   *id     = get_mode_ident(mode);
 273         ir_type *irtype = new_type_primitive(id, mode);
 274
 275         return irtype;
 276 }
 277
 278 static ir_type *create_method_type(const function_type_t *function_type)
 279 {
 280         type_t  *result_type  = function_type->result_type;
 281
 282         ident   *id           = unique_ident("functiontype");
 283         int      n_parameters = count_parameters(function_type);
 284         int      n_results    = result_type == type_void ? 0 : 1;
 285         ir_type *irtype       = new_type_method(id, n_parameters, n_results);
 286
 287         if(result_type != type_void) {
 288                 ir_type *restype = get_ir_type(result_type);
 289                 set_method_res_type(irtype, 0, restype);
 290         }
 291
 292         function_parameter_t *parameter = function_type->parameters;
 293         int                   n         = 0;
 294         for( ; parameter != NULL; parameter = parameter->next) {
 295                 ir_type *p_irtype = get_ir_type(parameter->type);
 296                 set_method_param_type(irtype, n, p_irtype);
 297                 ++n;
 298         }
 299
 300         if(function_type->variadic || function_type->unspecified_parameters) {
 301                 set_method_variadicity(irtype, variadicity_variadic);
 302         }
 303
 304         return irtype;
 305 }
 306
 307 static ir_type *create_pointer_type(pointer_type_t *type)
 308 {
 309         type_t  *points_to = type->points_to;
 310         ir_type *ir_points_to;
 311         /* Avoid endless recursion if the points_to type contains this poiner type
 312          * again (might be a struct). We therefore first create a void* pointer
 313          * and then set the real points_to type
 314          */
 315         ir_type *ir_type = new_type_pointer(unique_ident("pointer"),
 316                                             ir_type_void, mode_P_data);
 317         type->type.firm_type  = ir_type;
 318
 319         ir_points_to = get_ir_type(points_to);
 320         set_pointer_points_to_type(ir_type, ir_points_to);
 321
 322         return ir_type;
 323 }
 324
 325 static ir_type *create_array_type(array_type_t *type)
 326 {
 327         type_t  *element_type    = type->element_type;
 328         ir_type *ir_element_type = get_ir_type(element_type);
 329
 330         ident   *id      = unique_ident("array");
 331         ir_type *ir_type = new_type_array(id, 1, ir_element_type);
 332
 333         if(type->size != NULL) {
 334                 int n_elements = fold_constant(type->size);
 335
 336                 set_array_bounds_int(ir_type, 0, 0, n_elements);
 337
 338                 size_t elemsize = get_type_size_bytes(ir_element_type);
 339                 int align = get_type_alignment_bytes(ir_element_type);
 340                 if(elemsize % align > 0) {
 341                         elemsize += align - (elemsize % align);
 342                 }
 343                 set_type_size_bytes(ir_type, n_elements * elemsize);
 344                 set_type_alignment_bytes(ir_type, align);
 345                 set_type_state(ir_type, layout_fixed);
 346         }
 347
 348         return ir_type;
 349 }
 350
 351 #define INVALID_TYPE ((ir_type_ptr)-1)
 352
 353 static ir_type *create_struct_type(compound_type_t *type)
 354 {
 355         symbol_t *symbol = type->declaration->symbol;
 356         ident    *id;
 357         if(symbol != NULL) {
 358                 id = unique_ident(symbol->string);
 359         } else {
 360                 id = unique_ident("__anonymous_struct");
 361         }
 362         ir_type *ir_type = new_type_struct(id);
 363
 364         type->type.firm_type = ir_type;
 365
 366         int align_all = 1;
 367         int offset    = 0;
 368         declaration_t *entry = type->declaration->context.declarations;
 369         for( ; entry != NULL; entry = entry->next) {
 370                 if(entry->namespc != NAMESPACE_NORMAL)
 371                         continue;
 372
 373                 ident       *ident         = new_id_from_str(entry->symbol->string);
 374                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 375
 376                 int entry_size      = get_type_size_bytes(entry_ir_type);
 377                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 378                 int misalign        = offset % entry_alignment;
 379                 if (misalign != 0)
 380                         offset += entry_alignment - misalign;
 381
 382                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 383                 set_entity_offset(entity, offset);
 384                 add_struct_member(ir_type, entity);
 385                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 386                 entry->v.entity         = entity;
 387
 388                 offset += entry_size;
 389                 if(entry_alignment > align_all) {
 390                         if(entry_alignment % align_all != 0) {
 391                                 panic("Uneven alignments not supported yet");
 392                         }
 393                         align_all = entry_alignment;
 394                 }
 395         }
 396
 397         int misalign = offset % align_all;
 398         offset += misalign;
 399         set_type_alignment_bytes(ir_type, align_all);
 400         set_type_size_bytes(ir_type, offset);
 401         set_type_state(ir_type, layout_fixed);
 402
 403         return ir_type;
 404 }
 405
 406 static ir_type *create_union_type(compound_type_t *type)
 407 {
 408         declaration_t *declaration = type->declaration;
 409         symbol_t      *symbol      = declaration->symbol;
 410         ident         *id;
 411         if(symbol != NULL) {
 412                 id = unique_ident(symbol->string);
 413         } else {
 414                 id = unique_ident("__anonymous_union");
 415         }
 416         ir_type  *ir_type = new_type_union(id);
 417
 418         type->type.firm_type = ir_type;
 419
 420         int align_all = 1;
 421         int size      = 0;
 422         declaration_t *entry = declaration->context.declarations;
 423         for( ; entry != NULL; entry = entry->next) {
 424                 if(entry->namespc != NAMESPACE_NORMAL)
 425                         continue;
 426
 427                 ident       *ident         = new_id_from_str(entry->symbol->string);
 428                 ir_type_ptr  entry_ir_type = get_ir_type(entry->type);
 429
 430                 int entry_size      = get_type_size_bytes(entry_ir_type);
 431                 int entry_alignment = get_type_alignment_bytes(entry_ir_type);
 432
 433                 ir_entity *entity = new_entity(ir_type, ident, entry_ir_type);
 434                 add_union_member(ir_type, entity);
 435                 set_entity_offset(entity, 0);
 436                 entry->declaration_type = DECLARATION_TYPE_COMPOUND_MEMBER;
 437                 entry->v.entity         = entity;
 438
 439                 if(entry_size > size) {
 440                         size = entry_size;
 441                 }
 442                 if(entry_alignment > align_all) {
 443                         if(entry_alignment % align_all != 0) {
 444                                 panic("Uneven alignments not supported yet");
 445                         }
 446                         align_all = entry_alignment;
 447                 }
 448         }
 449
 450         set_type_alignment_bytes(ir_type, align_all);
 451         set_type_size_bytes(ir_type, size);
 452         set_type_state(ir_type, layout_fixed);
 453
 454         return ir_type;
 455 }
 456
 457 static ir_type *get_ir_type(type_t *type)
 458 {
 459         assert(type != NULL);
 460
 461         type = skip_typeref(type);
 462
 463         if(type->firm_type != NULL) {
 464                 assert(type->firm_type != INVALID_TYPE);
 465                 return type->firm_type;
 466         }
 467
 468         ir_type *firm_type = NULL;
 469         switch(type->type) {
 470         case TYPE_ATOMIC:
 471                 firm_type = create_atomic_type((atomic_type_t*) type);
 472                 break;
 473         case TYPE_FUNCTION:
 474                 firm_type = create_method_type((function_type_t*) type);
 475                 break;
 476         case TYPE_POINTER:
 477                 firm_type = create_pointer_type((pointer_type_t*) type);
 478                 break;
 479         case TYPE_ARRAY:
 480                 firm_type = create_array_type((array_type_t*) type);
 481                 break;
 482         case TYPE_COMPOUND_STRUCT:
 483                 firm_type = create_struct_type((compound_type_t*) type);
 484                 break;
 485         case TYPE_COMPOUND_UNION:
 486                 firm_type = create_union_type((compound_type_t*) type);
 487                 break;
 488         case TYPE_ENUM:
 489                 firm_type = ir_type_int;
 490                 break;
 491         case TYPE_BUILTIN:
 492         case TYPE_TYPEOF:
 493         case TYPE_TYPEDEF:
 494         case TYPE_INVALID:
 495                 break;
 496         }
 497         if(firm_type == NULL)
 498                 panic("unknown type found");
 499
 500         type->firm_type = firm_type;
 501         return firm_type;
 502 }
 503
 504 static inline ir_mode *get_ir_mode(type_t *type)
 505 {
 506         ir_type *irtype = get_ir_type(type);
 507
 508         /* firm doesn't report a mode for arrays somehow... */
 509         if(is_Array_type(irtype)) {
 510                 return mode_P;
 511         }
 512
 513         ir_mode *mode = get_type_mode(irtype);
 514         assert(mode != NULL);
 515         return mode;
 516 }
 517
 518 static ir_entity* get_function_entity(declaration_t *declaration)
 519 {
 520         if(declaration->declaration_type == DECLARATION_TYPE_FUNCTION)
 521                 return declaration->v.entity;
 522         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
 523
 524         symbol_t *symbol = declaration->symbol;
 525         ident    *id     = new_id_from_str(symbol->string);
 526
 527         ir_type  *global_type    = get_glob_type();
 528         ir_type  *ir_type_method = get_ir_type(declaration->type);
 529         assert(is_Method_type(ir_type_method));
 530
 531         ir_entity *entity = new_entity(global_type, id, ir_type_method);
 532         set_entity_ld_ident(entity, id);
 533         if(declaration->storage_class == STORAGE_CLASS_STATIC
 534                         || declaration->is_inline) {
 535                 set_entity_visibility(entity, visibility_local);
 536         } else if(declaration->init.statement != NULL) {
 537                 set_entity_visibility(entity, visibility_external_visible);
 538         } else {
 539                 set_entity_visibility(entity, visibility_external_allocated);
 540         }
 541
 542         declaration->declaration_type = DECLARATION_TYPE_FUNCTION;
 543         declaration->v.entity         = entity;
 544
 545         return entity;
 546 }
 547
 548
 549
 550 static ir_node *expression_to_firm(const expression_t *expression);
 551
 552 static dbg_info *get_dbg_info(const source_position_t *pos)
 553 {
 554         return (dbg_info*) pos;
 555 }
 556
 557 static ir_node *const_to_firm(const const_t *cnst)
 558 {
 559         dbg_info *dbgi = get_dbg_info(&cnst->expression.source_position);
 560         ir_mode  *mode = get_ir_mode(cnst->expression.datatype);
 561
 562         char    buf[128];
 563         tarval *tv;
 564         size_t  len;
 565         if(mode_is_float(mode)) {
 566                 tv = new_tarval_from_double(cnst->v.float_value, mode);
 567         } else {
 568                 if(mode_is_signed(mode)) {
 569                         len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
 570                 } else {
 571                         len = snprintf(buf, sizeof(buf), "%llu", cnst->v.int_value);
 572                 }
 573                 tv = new_tarval_from_str(buf, len, mode);
 574         }
 575
 576         return new_d_Const(dbgi, mode, tv);
 577 }
 578
 579 static ir_node *create_symconst(dbg_info *dbgi, ir_entity *entity)
 580 {
 581         assert(entity != NULL);
 582         union symconst_symbol sym;
 583         sym.entity_p = entity;
 584         return new_d_SymConst(dbgi, sym, symconst_addr_ent);
 585 }
 586
 587 static ir_node *string_to_firm(const source_position_t *const src_pos,
 588                                const char *const id_prefix,
 589                                const char *const string)
 590 {
 591         ir_type *const global_type = get_glob_type();
 592         ir_type *const type        = new_type_array(unique_ident("strtype"), 1,
 593                                                     ir_type_const_char);
 594
 595         ident     *const id     = unique_ident(id_prefix);
 596         ir_entity *const entity = new_entity(global_type, id, type);
 597         set_entity_ld_ident(entity, id);
 598         set_entity_variability(entity, variability_constant);
 599
 600         ir_type *const elem_type = ir_type_const_char;
 601         ir_mode *const mode      = get_type_mode(elem_type);
 602
 603         const size_t slen = strlen(string) + 1;
 604
 605         set_array_lower_bound_int(type, 0, 0);
 606         set_array_upper_bound_int(type, 0, slen);
 607         set_type_size_bytes(type, slen);
 608         set_type_state(type, layout_fixed);
 609
 610         tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
 611         for(size_t i = 0; i < slen; ++i) {
 612                 tvs[i] = new_tarval_from_long(string[i], mode);
 613         }
 614
 615         set_array_entity_values(entity, tvs, slen);
 616         free(tvs);
 617
 618         dbg_info *const dbgi = get_dbg_info(src_pos);
 619
 620         return create_symconst(dbgi, entity);
 621 }
 622
 623 static ir_node *string_literal_to_firm(const string_literal_t* literal)
 624 {
 625         return string_to_firm(&literal->expression.source_position, "Lstr",
 626                               literal->value);
 627 }
 628
 629 static ir_node *deref_address(type_t *const type, ir_node *const addr,
 630                               dbg_info *const dbgi)
 631 {
 632         switch (type->type) {
 633                 case TYPE_ARRAY:
 634                 case TYPE_COMPOUND_STRUCT:
 635                 case TYPE_COMPOUND_UNION:
 636                         return addr;
 637
 638                 default: {
 639                         ir_mode *const mode     = get_ir_mode(type);
 640                         ir_node *const memory   = get_store();
 641                         ir_node *const load     = new_d_Load(dbgi, memory, addr, mode);
 642                         ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
 643                         ir_node *const load_res = new_d_Proj(dbgi, load, mode,   pn_Load_res);
 644                         set_store(load_mem);
 645                         return load_res;
 646                 }
 647         }
 648 }
 649
 650 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
 651 {
 652         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 653         declaration_t *declaration = ref->declaration;
 654         type_t        *type        = skip_typeref(declaration->type);
 655
 656         switch((declaration_type_t) declaration->declaration_type) {
 657         case DECLARATION_TYPE_UNKNOWN:
 658                 break;
 659         case DECLARATION_TYPE_LOCAL_VARIABLE: {
 660                 ir_mode *mode = get_ir_mode(type);
 661                 return get_value(declaration->v.value_number, mode);
 662         }
 663         case DECLARATION_TYPE_FUNCTION: {
 664                 return create_symconst(dbgi, declaration->v.entity);
 665         }
 666         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 667                 ir_entity *entity   = declaration->v.entity;
 668                 ir_node   *symconst = create_symconst(dbgi, entity);
 669                 return deref_address(type, symconst, dbgi);
 670         }
 671         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 672                 ir_entity *entity = declaration->v.entity;
 673                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 674                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 675                 return deref_address(type, sel, dbgi);
 676         }
 677
 678         case DECLARATION_TYPE_COMPOUND_MEMBER:
 679         case DECLARATION_TYPE_LABEL_BLOCK:
 680                 panic("not implemented reference type");
 681         }
 682
 683         panic("reference to declaration with unknown type found");
 684 }
 685
 686 static ir_node *reference_addr(const reference_expression_t *ref)
 687 {
 688         dbg_info      *dbgi        = get_dbg_info(&ref->expression.source_position);
 689         declaration_t *declaration = ref->declaration;
 690
 691         switch((declaration_type_t) declaration->declaration_type) {
 692         case DECLARATION_TYPE_UNKNOWN:
 693                 break;
 694         case DECLARATION_TYPE_LOCAL_VARIABLE:
 695                 panic("local variable without entity has no address");
 696         case DECLARATION_TYPE_FUNCTION: {
 697                 return create_symconst(dbgi, declaration->v.entity);
 698         }
 699         case DECLARATION_TYPE_GLOBAL_VARIABLE: {
 700                 ir_entity *entity   = declaration->v.entity;
 701                 ir_node   *symconst = create_symconst(dbgi, entity);
 702                 return symconst;
 703         }
 704         case DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY: {
 705                 ir_entity *entity = declaration->v.entity;
 706                 ir_node   *frame  = get_irg_frame(current_ir_graph);
 707                 ir_node   *sel    = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
 708
 709                 return sel;
 710         }
 711         case DECLARATION_TYPE_COMPOUND_MEMBER:
 712         case DECLARATION_TYPE_LABEL_BLOCK:
 713                 panic("not implemented reference type");
 714         }
 715
 716         panic("reference to declaration with unknown type found");
 717 }
 718
 719 static ir_node *process_builtin_call(const call_expression_t *call)
 720 {
 721         dbg_info *dbgi = get_dbg_info(&call->expression.source_position);
 722
 723         assert(call->function->type == EXPR_BUILTIN_SYMBOL);
 724         builtin_symbol_expression_t *builtin
 725                 = (builtin_symbol_expression_t*) call->function;
 726         symbol_t *symbol = builtin->symbol;
 727
 728         if(symbol == symbol_alloca) {
 729                 if(call->arguments == NULL || call->arguments->next != NULL) {
 730                         panic("invalid number of parameters on __builtin_alloca");
 731                 }
 732                 expression_t *argument = call->arguments->expression;
 733                 ir_node      *size     = expression_to_firm(argument);
 734
 735                 ir_node *store  = get_store();
 736                 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
 737                                               stack_alloc);
 738                 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
 739                 set_store(proj_m);
 740                 ir_node *res    = new_Proj(alloca, mode_P_data, pn_Alloc_res);
 741
 742                 return res;
 743         } else {
 744                 panic("Unsupported builtin found\n");
 745         }
 746 }
 747
 748 static ir_node *call_expression_to_firm(const call_expression_t *call)
 749 {
 750         assert(get_cur_block() != NULL);
 751
 752         expression_t  *function = call->function;
 753         if(function->type == EXPR_BUILTIN_SYMBOL) {
 754                 return process_builtin_call(call);
 755         }
 756         ir_node       *callee   = expression_to_firm(function);
 757
 758         function_type_t *function_type;
 759         if (function->datatype->type == TYPE_POINTER) {
 760                 pointer_type_t *const ptr_type = (pointer_type_t*)function->datatype;
 761                 assert(ptr_type->points_to->type == TYPE_FUNCTION);
 762                 function_type = (function_type_t*)ptr_type->points_to;
 763         } else {
 764                 assert(function->datatype->type == TYPE_FUNCTION);
 765                 function_type = (function_type_t*)function->datatype;
 766         }
 767
 768         int              n_parameters = 0;
 769         call_argument_t *argument     = call->arguments;
 770         for( ; argument != NULL; argument = argument->next) {
 771                 ++n_parameters;
 772         }
 773
 774         ir_type *ir_method_type  = get_ir_type((type_t*) function_type);
 775         ir_type *new_method_type = NULL;
 776         if(function_type->variadic || function_type->unspecified_parameters) {
 777                 /* we need to construct a new method type matching the call
 778                  * arguments... */
 779                 int n_res       = get_method_n_ress(ir_method_type);
 780                 new_method_type = new_type_method(unique_ident("calltype"),
 781                                                   n_parameters, n_res);
 782                 set_method_calling_convention(new_method_type,
 783                                get_method_calling_convention(ir_method_type));
 784                 set_method_additional_properties(new_method_type,
 785                                get_method_additional_properties(ir_method_type));
 786
 787                 for(int i = 0; i < n_res; ++i) {
 788                         set_method_res_type(new_method_type, i,
 789                                             get_method_res_type(ir_method_type, i));
 790                 }
 791         }
 792         ir_node *in[n_parameters];
 793
 794         argument = call->arguments;
 795         int n = 0;
 796         for( ; argument != NULL; argument = argument->next) {
 797                 expression_t *expression = argument->expression;
 798                 ir_node      *arg_node   = expression_to_firm(expression);
 799
 800                 in[n] = arg_node;
 801                 if(new_method_type != NULL) {
 802                         ir_type *irtype = get_ir_type(expression->datatype);
 803                         set_method_param_type(new_method_type, n, irtype);
 804                 }
 805
 806                 n++;
 807         }
 808         assert(n == n_parameters);
 809
 810         if(new_method_type != NULL)
 811                 ir_method_type = new_method_type;
 812
 813         dbg_info *dbgi  = get_dbg_info(&call->expression.source_position);
 814         ir_node  *store = get_store();
 815         ir_node  *node  = new_d_Call(dbgi, store, callee, n_parameters, in,
 816                                      ir_method_type);
 817         ir_node  *mem   = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
 818         set_store(mem);
 819
 820         type_t  *result_type = function_type->result_type;
 821         ir_node *result      = NULL;
 822         if(result_type != type_void) {
 823                 ir_mode *mode    = get_ir_mode(result_type);
 824                 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
 825                 result           = new_d_Proj(dbgi, resproj, mode, 0);
 826         }
 827
 828         return result;
 829 }
 830
 831 static void statement_to_firm(statement_t *statement);
 832 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
 833
 834 static ir_node *expression_to_addr(const expression_t *expression);
 835 static void create_condition_evaluation(const expression_t *expression,
 836                                         ir_node *true_block,
 837                                         ir_node *false_block);
 838
 839 static void set_value_for_expression(const expression_t *expression,
 840                                      ir_node *value)
 841 {
 842         if(expression->type == EXPR_REFERENCE) {
 843                 reference_expression_t *ref = (reference_expression_t*) expression;
 844
 845                 declaration_t *declaration = ref->declaration;
 846                 assert(declaration->declaration_type != DECLARATION_TYPE_UNKNOWN);
 847                 if(declaration->declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
 848                         set_value(declaration->v.value_number, value);
 849                         return;
 850                 }
 851         }
 852
 853         dbg_info *dbgi      = get_dbg_info(&expression->source_position);
 854         ir_node  *addr      = expression_to_addr(expression);
 855         assert(get_irn_mode(value) == get_ir_mode(expression->datatype));
 856         ir_node  *memory    = get_store();
 857         ir_node  *store     = new_d_Store(dbgi, memory, addr, value);
 858         ir_node  *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
 859         set_store(store_mem);
 860 }
 861
 862 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
 863 {
 864         ir_mode *value_mode = get_irn_mode(value);
 865
 866         if (value_mode == dest_mode || is_Bad(value))
 867                 return value;
 868
 869         if(dest_mode == mode_b) {
 870                 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
 871                 ir_node *cmp  = new_d_Cmp(dbgi, value, zero);
 872                 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
 873                 return proj;
 874         }
 875
 876         return new_d_Conv(dbgi, value, dest_mode);
 877 }
 878
 879 static ir_node *create_incdec(const unary_expression_t *expression)
 880 {
 881         dbg_info     *dbgi  = get_dbg_info(&expression->expression.source_position);
 882         type_t       *type  = expression->expression.datatype;
 883         ir_mode      *mode  = get_ir_mode(type);
 884         expression_t *value = expression->value;
 885
 886         ir_node *value_node = expression_to_firm(value);
 887
 888         ir_node *offset;
 889         if(type->type == TYPE_POINTER) {
 890                 pointer_type_t *pointer_type = (pointer_type_t*) type;
 891                 unsigned        elem_size    = get_type_size(pointer_type->points_to);
 892                 offset = new_Const_long(mode_Is, elem_size);
 893         } else {
 894                 assert(is_type_arithmetic(type));
 895                 offset = new_Const(mode, get_mode_one(mode));
 896         }
 897
 898         ir_node *new_value;
 899         switch(expression->type) {
 900         case UNEXPR_POSTFIX_INCREMENT: {
 901                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 902                 set_value_for_expression(value, new_value);
 903                 return value_node;
 904         }
 905         case UNEXPR_POSTFIX_DECREMENT: {
 906                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 907                 set_value_for_expression(value, new_value);
 908                 return value_node;
 909         }
 910         case UNEXPR_PREFIX_INCREMENT: {
 911                 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
 912                 set_value_for_expression(value, new_value);
 913                 return new_value;
 914         }
 915         case UNEXPR_PREFIX_DECREMENT: {
 916                 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
 917                 set_value_for_expression(value, new_value);
 918                 return new_value;
 919         }
 920         default:
 921                 panic("no incdec expr in create_incdec");
 922         }
 923
 924         return new_value;
 925 }
 926
 927 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
 928 {
 929         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 930         type_t   *type = expression->expression.datatype;
 931
 932         if(expression->type == UNEXPR_TAKE_ADDRESS)
 933                 return expression_to_addr(expression->value);
 934
 935         const expression_t *value      = expression->value;
 936         ir_node            *value_node = expression_to_firm(value);
 937
 938         switch(expression->type) {
 939         case UNEXPR_NEGATE:
 940                 return new_d_Minus(dbgi, value_node, get_ir_mode(type));
 941         case UNEXPR_PLUS:
 942                 return value_node;
 943         case UNEXPR_BITWISE_NEGATE:
 944                 return new_d_Not(dbgi, value_node, get_ir_mode(type));
 945         case UNEXPR_NOT: {
 946                 if(get_irn_mode(value_node) != mode_b) {
 947                         value_node = create_conv(dbgi, value_node, mode_b);
 948                 }
 949                 value_node = new_d_Not(dbgi, value_node, mode_b);
 950                 ir_mode *const mode = get_ir_mode(type);
 951                 if(mode != mode_b) {
 952                         value_node = create_conv(dbgi, value_node, mode);
 953                 }
 954                 return value_node;
 955         }
 956         case UNEXPR_DEREFERENCE:
 957                 return deref_address(type, value_node, dbgi);
 958         case UNEXPR_POSTFIX_INCREMENT:
 959         case UNEXPR_POSTFIX_DECREMENT:
 960         case UNEXPR_PREFIX_INCREMENT:
 961         case UNEXPR_PREFIX_DECREMENT:
 962                 return create_incdec(expression);
 963         case UNEXPR_CAST:
 964                 return create_conv(dbgi, value_node, get_ir_mode(type));
 965
 966         case UNEXPR_TAKE_ADDRESS:
 967         case UNEXPR_INVALID:
 968                 break;
 969         }
 970         panic("invalid UNEXPR type found");
 971 }
 972
 973 static long get_pnc(binary_expression_type_t type)
 974 {
 975         switch(type) {
 976         case BINEXPR_EQUAL:        return pn_Cmp_Eq;
 977         case BINEXPR_NOTEQUAL:     return pn_Cmp_Lg;
 978         case BINEXPR_LESS:         return pn_Cmp_Lt;
 979         case BINEXPR_LESSEQUAL:    return pn_Cmp_Le;
 980         case BINEXPR_GREATER:      return pn_Cmp_Gt;
 981         case BINEXPR_GREATEREQUAL: return pn_Cmp_Ge;
 982         default:
 983                 break;
 984         }
 985         panic("trying to get pn_Cmp from non-comparison binexpr type");
 986 }
 987
 988 static ir_node *create_lazy_op(const binary_expression_t *expression)
 989 {
 990         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
 991         type_t   *type = expression->expression.datatype;
 992         ir_mode  *mode = get_ir_mode(type);
 993
 994         ir_node *cur_block = get_cur_block();
 995
 996         ir_node *one_block = new_immBlock();
 997         ir_node *one       = new_Const(mode, get_mode_one(mode));
 998         ir_node *jmp_one   = new_d_Jmp(dbgi);
 999
1000         ir_node *zero_block = new_immBlock();
1001         ir_node *zero       = new_Const(mode, get_mode_null(mode));
1002         ir_node *jmp_zero   = new_d_Jmp(dbgi);
1003
1004         set_cur_block(cur_block);
1005         create_condition_evaluation((const expression_t*) expression,
1006                                     one_block, zero_block);
1007         mature_immBlock(one_block);
1008         mature_immBlock(zero_block);
1009
1010         ir_node *common_block = new_immBlock();
1011         add_immBlock_pred(common_block, jmp_one);
1012         add_immBlock_pred(common_block, jmp_zero);
1013         mature_immBlock(common_block);
1014
1015         ir_node *in[2] = { one, zero };
1016         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1017
1018         return val;
1019 }
1020
1021 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1022                                             ir_node *right, ir_mode *mode);
1023
1024 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1025                                         create_arithmetic_func func)
1026 {
1027         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1028         ir_node  *left  = expression_to_firm(expression->left);
1029         ir_node  *right = expression_to_firm(expression->right);
1030         type_t   *type  = expression->right->datatype;
1031         /* be careful with the modes, because in arithmetic assign nodes only
1032          * the right operand has the mode of the arithmetic already */
1033         ir_mode  *mode  = get_ir_mode(type);
1034         left            = create_conv(dbgi, left, mode);
1035         ir_node  *res   = func(dbgi, left, right, mode);
1036
1037         return res;
1038 }
1039
1040 static ir_node *pointer_arithmetic(ir_node  *const pointer,
1041                                    ir_node  *      integer,
1042                                    type_t   *const type,
1043                                    dbg_info *const dbgi,
1044                                    const create_arithmetic_func func)
1045 {
1046         pointer_type_t *const pointer_type = (pointer_type_t*)type;
1047         type_t         *const points_to    = pointer_type->points_to;
1048         const unsigned        elem_size    = get_type_size(points_to);
1049
1050         assert(elem_size >= 1);
1051         if (elem_size > 1) {
1052                 integer             = create_conv(dbgi, integer, mode_Is);
1053                 ir_node *const cnst = new_Const_long(mode_Is, (long)elem_size);
1054                 ir_node *const mul  = new_d_Mul(dbgi, integer, cnst, mode_Is);
1055                 integer = mul;
1056         }
1057
1058         ir_mode *const mode = get_ir_mode(type);
1059         return func(dbgi, pointer, integer, mode);
1060 }
1061
1062 static ir_node *create_arithmetic_assign_binop(
1063                 const binary_expression_t *expression, create_arithmetic_func func)
1064 {
1065         dbg_info *const dbgi = get_dbg_info(&expression->expression.source_position);
1066         type_t   *const type = expression->expression.datatype;
1067         ir_node  *value;
1068
1069         if (type->type == TYPE_POINTER) {
1070                 ir_node        *const pointer = expression_to_firm(expression->left);
1071                 ir_node        *      integer = expression_to_firm(expression->right);
1072                 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
1073         } else {
1074                 value = create_arithmetic_binop(expression, func);
1075         }
1076
1077         ir_mode  *const mode = get_ir_mode(type);
1078         value = create_conv(dbgi, value, mode);
1079         set_value_for_expression(expression->left, value);
1080
1081         return value;
1082 }
1083
1084 static ir_node *create_add(const binary_expression_t *expression)
1085 {
1086         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1087         ir_node  *left  = expression_to_firm(expression->left);
1088         ir_node  *right = expression_to_firm(expression->right);
1089         type_t   *type  = expression->expression.datatype;
1090
1091         expression_t *expr_left  = expression->left;
1092         expression_t *expr_right = expression->right;
1093         type_t       *type_left  = skip_typeref(expr_left->datatype);
1094         type_t       *type_right = skip_typeref(expr_right->datatype);
1095
1096         if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1097                 ir_mode *const mode = get_ir_mode(type);
1098                 return new_d_Add(dbgi, left, right, mode);
1099         }
1100
1101         if (type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1102                 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
1103         } else {
1104                 assert(type_right->type == TYPE_POINTER || type_right->type == TYPE_ARRAY);
1105                 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
1106         }
1107 }
1108
1109 static ir_node *create_sub(const binary_expression_t *expression)
1110 {
1111         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1112         expression_t *const expr_left  = expression->left;
1113         expression_t *const expr_right = expression->right;
1114         ir_node      *const left       = expression_to_firm(expr_left);
1115         ir_node      *const right      = expression_to_firm(expr_right);
1116         type_t       *const type       = expression->expression.datatype;
1117         type_t       *const type_left  = skip_typeref(expr_left->datatype);
1118         type_t       *const type_right = skip_typeref(expr_right->datatype);
1119
1120         if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
1121                 ir_mode *const mode = get_ir_mode(type);
1122                 return new_d_Sub(dbgi, left, right, mode);
1123         } else if (type_left->type == TYPE_POINTER && type_right->type == TYPE_POINTER) {
1124                 const pointer_type_t *const ptr_type = (const pointer_type_t*)type_left;
1125                 const unsigned elem_size             = get_type_size(ptr_type->points_to);
1126                 ir_mode *const mode   = get_ir_mode(type);
1127                 ir_node *const sub    = new_d_Sub(dbgi, left, right, mode);
1128                 ir_node *const cnst   = new_Const_long(mode_Is, (long)elem_size);
1129                 ir_node *const no_mem = new_NoMem();
1130                 ir_node *const div    = new_d_Div(dbgi, no_mem, sub, cnst, mode,
1131                                                   op_pin_state_floats);
1132                 return new_d_Proj(dbgi, div, mode, pn_Div_res);
1133         }
1134
1135         assert(type_left->type == TYPE_POINTER);
1136         return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
1137 }
1138
1139 static ir_node *create_shift(const binary_expression_t *expression)
1140 {
1141         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1142         ir_node  *left  = expression_to_firm(expression->left);
1143         ir_node  *right = expression_to_firm(expression->right);
1144         type_t   *type  = expression->expression.datatype;
1145         ir_mode  *mode  = get_ir_mode(type);
1146
1147         /* firm always wants the shift count to be unsigned */
1148         right = create_conv(dbgi, right, mode_Iu);
1149
1150         ir_node *res;
1151
1152         switch(expression->type) {
1153         case BINEXPR_SHIFTLEFT_ASSIGN:
1154         case BINEXPR_SHIFTLEFT:
1155                 res = new_d_Shl(dbgi, left, right, mode);
1156                 break;
1157         case BINEXPR_SHIFTRIGHT_ASSIGN:
1158         case BINEXPR_SHIFTRIGHT: {
1159                  expression_t *expr_left = expression->left;
1160                  type_t       *type_left = skip_typeref(expr_left->datatype);
1161
1162                  if(is_type_signed(type_left)) {
1163                         res = new_d_Shrs(dbgi, left, right, mode);
1164                  } else {
1165                          res = new_d_Shr(dbgi, left, right, mode);
1166                  }
1167                  break;
1168         }
1169         default:
1170                 panic("create shift op called for non-shift op");
1171         }
1172
1173         return res;
1174 }
1175
1176
1177 static ir_node *create_divmod(const binary_expression_t *expression)
1178 {
1179         dbg_info *dbgi  = get_dbg_info(&expression->expression.source_position);
1180         ir_node  *left  = expression_to_firm(expression->left);
1181         ir_node  *right = expression_to_firm(expression->right);
1182         ir_node  *pin   = new_Pin(new_NoMem());
1183         /* be careful with the modes, because in arithmetic assign nodes only
1184          * the right operand has the mode of the arithmetic already */
1185         type_t   *type  = expression->right->datatype;
1186         ir_mode  *mode  = get_ir_mode(type);
1187         left            = create_conv(dbgi, left, mode);
1188         ir_node  *op;
1189         ir_node  *res;
1190
1191         switch (expression->type)  {
1192                 case BINEXPR_DIV:
1193                 case BINEXPR_DIV_ASSIGN:
1194                         if(mode_is_float(mode)) {
1195                                 op  = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
1196                                 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
1197                         } else {
1198                                 op  = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
1199                                 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
1200                         }
1201                         break;
1202
1203                 case BINEXPR_MOD:
1204                 case BINEXPR_MOD_ASSIGN:
1205                         assert(!mode_is_float(mode));
1206                         op  = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
1207                         res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
1208                         break;
1209
1210                 default: panic("unexpected binary expression type in create_divmod()");
1211         }
1212
1213         return res;
1214 }
1215
1216 static ir_node *create_arithmetic_assign_divmod(
1217                 const binary_expression_t *expression)
1218 {
1219         ir_node  *      value = create_divmod(expression);
1220         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1221         type_t   *const type  = expression->expression.datatype;
1222         ir_mode  *const mode  = get_ir_mode(type);
1223
1224         assert(type->type != TYPE_POINTER);
1225
1226         value = create_conv(dbgi, value, mode);
1227         set_value_for_expression(expression->left, value);
1228
1229         return value;
1230 }
1231
1232 static ir_node *create_arithmetic_assign_shift(
1233                 const binary_expression_t *expression)
1234 {
1235         ir_node  *      value = create_shift(expression);
1236         dbg_info *const dbgi  = get_dbg_info(&expression->expression.source_position);
1237         type_t   *const type  = expression->expression.datatype;
1238         ir_mode  *const mode  = get_ir_mode(type);
1239
1240         value = create_conv(dbgi, value, mode);
1241         set_value_for_expression(expression->left, value);
1242
1243         return value;
1244 }
1245
1246 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
1247 {
1248         binary_expression_type_t type = expression->type;
1249         switch(type) {
1250         case BINEXPR_EQUAL:
1251         case BINEXPR_NOTEQUAL:
1252         case BINEXPR_LESS:
1253         case BINEXPR_LESSEQUAL:
1254         case BINEXPR_GREATER:
1255         case BINEXPR_GREATEREQUAL: {
1256                 dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1257                 ir_node *left  = expression_to_firm(expression->left);
1258                 ir_node *right = expression_to_firm(expression->right);
1259                 ir_node *cmp   = new_d_Cmp(dbgi, left, right);
1260                 long     pnc   = get_pnc(type);
1261                 ir_node *proj  = new_d_Proj(dbgi, cmp, mode_b, pnc);
1262                 return proj;
1263         }
1264         case BINEXPR_ASSIGN: {
1265                 ir_node *right = expression_to_firm(expression->right);
1266                 set_value_for_expression(expression->left, right);
1267                 return right;
1268         }
1269         case BINEXPR_ADD:
1270                 return create_add(expression);
1271         case BINEXPR_SUB:
1272                 return create_sub(expression);
1273         case BINEXPR_MUL:
1274                 return create_arithmetic_binop(expression, new_d_Mul);
1275         case BINEXPR_BITWISE_AND:
1276                 return create_arithmetic_binop(expression, new_d_And);
1277         case BINEXPR_BITWISE_OR:
1278                 return create_arithmetic_binop(expression, new_d_Or);
1279         case BINEXPR_BITWISE_XOR:
1280                 return create_arithmetic_binop(expression, new_d_Eor);
1281         case BINEXPR_SHIFTLEFT:
1282         case BINEXPR_SHIFTRIGHT:
1283                 return create_shift(expression);
1284         case BINEXPR_DIV:
1285         case BINEXPR_MOD:
1286                 return create_divmod(expression);
1287         case BINEXPR_LOGICAL_AND:
1288         case BINEXPR_LOGICAL_OR:
1289                 return create_lazy_op(expression);
1290         case BINEXPR_COMMA:
1291                 expression_to_firm(expression->left);
1292                 return expression_to_firm(expression->right);
1293         case BINEXPR_ADD_ASSIGN:
1294                 return create_arithmetic_assign_binop(expression, new_d_Add);
1295         case BINEXPR_SUB_ASSIGN:
1296                 return create_arithmetic_assign_binop(expression, new_d_Sub);
1297         case BINEXPR_MUL_ASSIGN:
1298                 return create_arithmetic_assign_binop(expression, new_d_Mul);
1299         case BINEXPR_DIV_ASSIGN:
1300                 return create_arithmetic_assign_divmod(expression);
1301         case BINEXPR_BITWISE_AND_ASSIGN:
1302                 return create_arithmetic_assign_binop(expression, new_d_And);
1303         case BINEXPR_BITWISE_OR_ASSIGN:
1304                 return create_arithmetic_assign_binop(expression, new_d_Or);
1305         case BINEXPR_BITWISE_XOR_ASSIGN:
1306                 return create_arithmetic_assign_binop(expression, new_d_Eor);
1307         case BINEXPR_SHIFTLEFT_ASSIGN:
1308         case BINEXPR_SHIFTRIGHT_ASSIGN:
1309                 return create_arithmetic_assign_shift(expression);
1310         default:
1311                 panic("TODO binexpr type");
1312         }
1313 }
1314
1315 static ir_node *array_access_addr(const array_access_expression_t *expression)
1316 {
1317         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1318         ir_node  *base_addr;
1319         ir_node  *offset;
1320
1321         type_t   *type_left  = skip_typeref(expression->array_ref->datatype);
1322         type_t   *type_right = skip_typeref(expression->index->datatype);
1323
1324         if(type_left->type == TYPE_POINTER || type_left->type == TYPE_ARRAY) {
1325                 base_addr = expression_to_firm(expression->array_ref);
1326                 offset    = expression_to_firm(expression->index);
1327         } else {
1328                 assert(type_right->type == TYPE_POINTER
1329                                 || type_right->type == TYPE_ARRAY);
1330                 base_addr = expression_to_firm(expression->index);
1331                 offset    = expression_to_firm(expression->array_ref);
1332         }
1333         offset    = create_conv(dbgi, offset, mode_Iu);
1334
1335         unsigned elem_size       = get_type_size(expression->expression.datatype);
1336         ir_node *elem_size_const = new_Const_long(mode_Iu, elem_size);
1337         ir_node *real_offset     = new_d_Mul(dbgi, offset, elem_size_const,
1338                                              mode_Iu);
1339         ir_node *result          = new_d_Add(dbgi, base_addr, real_offset, mode_P);
1340
1341         return result;
1342 }
1343
1344 static ir_node *array_access_to_firm(
1345                 const array_access_expression_t *expression)
1346 {
1347         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1348         ir_node  *addr = array_access_addr(expression);
1349         type_t   *type = skip_typeref(expression->expression.datatype);
1350         return deref_address(type, addr, dbgi);
1351 }
1352
1353 static ir_node *sizeof_to_firm(const sizeof_expression_t *expression)
1354 {
1355         type_t *type = expression->type;
1356         if(type == NULL) {
1357                 type = expression->size_expression->datatype;
1358                 assert(type != NULL);
1359         }
1360
1361         ir_mode  *mode      = get_ir_mode(expression->expression.datatype);
1362         unsigned  size      = get_type_size(type);
1363         ir_node  *size_node = new_Const_long(mode, size);
1364
1365         return size_node;
1366 }
1367
1368 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
1369 {
1370         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1371
1372         ir_node *cur_block   = get_cur_block();
1373
1374         /* create the true block */
1375         ir_node *true_block  = new_immBlock();
1376
1377         ir_node *true_val = expression_to_firm(expression->true_expression);
1378         ir_node *true_jmp = new_Jmp();
1379
1380         /* create the false block */
1381         ir_node *false_block = new_immBlock();
1382
1383         ir_node *false_val = expression_to_firm(expression->false_expression);
1384         ir_node *false_jmp = new_Jmp();
1385
1386         /* create the condition evaluation */
1387         set_cur_block(cur_block);
1388         create_condition_evaluation(expression->condition, true_block, false_block);
1389         mature_immBlock(true_block);
1390         mature_immBlock(false_block);
1391
1392         /* create the common block */
1393         ir_node *common_block = new_immBlock();
1394         add_immBlock_pred(common_block, true_jmp);
1395         add_immBlock_pred(common_block, false_jmp);
1396         mature_immBlock(common_block);
1397
1398         /* TODO improve static semantics, so either both or no values are NULL */
1399         if (true_val == NULL || false_val == NULL) return NULL;
1400
1401         ir_node *in[2] = { true_val, false_val };
1402         ir_mode *mode  = get_irn_mode(true_val);
1403         assert(get_irn_mode(false_val) == mode);
1404         ir_node *val   = new_d_Phi(dbgi, 2, in, mode);
1405
1406         return val;
1407 }
1408
1409 static ir_node *select_addr(const select_expression_t *expression)
1410 {
1411         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1412
1413         ir_node *compound_addr = expression_to_firm(expression->compound);
1414
1415         declaration_t *entry = expression->compound_entry;
1416         assert(entry->declaration_type == DECLARATION_TYPE_COMPOUND_MEMBER);
1417         ir_entity     *entity = entry->v.entity;
1418
1419         assert(entity != NULL);
1420
1421         ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
1422
1423         return sel;
1424 }
1425
1426 static ir_node *select_to_firm(const select_expression_t *expression)
1427 {
1428         dbg_info *dbgi = get_dbg_info(&expression->expression.source_position);
1429         ir_node  *addr = select_addr(expression);
1430         type_t   *type = skip_typeref(expression->expression.datatype);
1431         return deref_address(type, addr, dbgi);
1432 }
1433
1434 /* Values returned by __builtin_classify_type. */
1435 typedef enum gcc_type_class
1436 {
1437         no_type_class = -1,
1438         void_type_class,
1439         integer_type_class,
1440         char_type_class,
1441         enumeral_type_class,
1442         boolean_type_class,
1443         pointer_type_class,
1444         reference_type_class,
1445         offset_type_class,
1446         real_type_class,
1447         complex_type_class,
1448         function_type_class,
1449         method_type_class,
1450         record_type_class,
1451         union_type_class,
1452         array_type_class,
1453         string_type_class,
1454         set_type_class,
1455         file_type_class,
1456         lang_type_class
1457 } gcc_type_class;
1458
1459 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
1460 {
1461         const type_t *const type = expr->type_expression->datatype;
1462
1463         gcc_type_class tc;
1464         switch (type->type)
1465         {
1466                 case TYPE_ATOMIC: {
1467                         const atomic_type_t *const atomic_type = (const atomic_type_t*)type;
1468                         switch (atomic_type->atype) {
1469                                 // should not be reached
1470                                 case ATOMIC_TYPE_INVALID:
1471                                         tc = no_type_class;
1472                                         break;
1473
1474                                 // gcc cannot do that
1475                                 case ATOMIC_TYPE_VOID:
1476                                         tc = void_type_class;
1477                                         break;
1478
1479                                 case ATOMIC_TYPE_CHAR:      // gcc handles this as integer
1480                                 case ATOMIC_TYPE_SCHAR:     // gcc handles this as integer
1481                                 case ATOMIC_TYPE_UCHAR:     // gcc handles this as integer
1482                                 case ATOMIC_TYPE_SHORT:
1483                                 case ATOMIC_TYPE_USHORT:
1484                                 case ATOMIC_TYPE_INT:
1485                                 case ATOMIC_TYPE_UINT:
1486                                 case ATOMIC_TYPE_LONG:
1487                                 case ATOMIC_TYPE_ULONG:
1488                                 case ATOMIC_TYPE_LONGLONG:
1489                                 case ATOMIC_TYPE_ULONGLONG:
1490                                 case ATOMIC_TYPE_BOOL:      // gcc handles this as integer
1491                                         tc = integer_type_class;
1492                                         break;
1493
1494                                 case ATOMIC_TYPE_FLOAT:
1495                                 case ATOMIC_TYPE_DOUBLE:
1496                                 case ATOMIC_TYPE_LONG_DOUBLE:
1497                                         tc = real_type_class;
1498                                         break;
1499
1500 #ifdef PROVIDE_COMPLEX
1501                                 case ATOMIC_TYPE_FLOAT_COMPLEX:
1502                                 case ATOMIC_TYPE_DOUBLE_COMPLEX:
1503                                 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
1504                                         tc = complex_type_class;
1505                                         break;
1506                                 case ATOMIC_TYPE_FLOAT_IMAGINARY:
1507                                 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
1508                                 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
1509                                         tc = complex_type_class;
1510                                         break;
1511 #endif
1512
1513                                 default:
1514                                         panic("Unimplemented case in classify_type_to_firm().");
1515                         }
1516                         break;
1517                 }
1518
1519                 case TYPE_ARRAY:           // gcc handles this as pointer
1520                 case TYPE_FUNCTION:        // gcc handles this as pointer
1521                 case TYPE_POINTER:         tc = pointer_type_class; break;
1522                 case TYPE_COMPOUND_STRUCT: tc = record_type_class;  break;
1523                 case TYPE_COMPOUND_UNION:  tc = union_type_class;   break;
1524
1525                 // gcc handles this as integer
1526                 case TYPE_ENUM:            tc = integer_type_class; break;
1527
1528                 default:
1529                         panic("Unimplemented case in classify_type_to_firm().");
1530         }
1531
1532         dbg_info *const dbgi = get_dbg_info(&expr->expression.source_position);
1533         ir_mode  *const mode = mode_Is;
1534         tarval   *const tv   = new_tarval_from_long(tc, mode);
1535         return new_d_Const(dbgi, mode, tv);
1536 }
1537
1538 static ir_node *function_name_to_firm(const string_literal_t *const expr)
1539 {
1540         if (current_function_name == NULL) {
1541                 const source_position_t *const src_pos =
1542                         &expr->expression.source_position;
1543                 const char *const name = current_function_decl->symbol->string;
1544                 current_function_name = string_to_firm(src_pos, "__func__", name);
1545         }
1546
1547         return current_function_name;
1548 }
1549
1550 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
1551 {
1552         statement_t *statement = expr->statement;
1553
1554         assert(statement->type == STATEMENT_COMPOUND);
1555         return compound_statement_to_firm((compound_statement_t*) statement);
1556 }
1557
1558 static ir_node *dereference_addr(const unary_expression_t *const expression)
1559 {
1560         assert(expression->type == UNEXPR_DEREFERENCE);
1561         return expression_to_firm(expression->value);
1562 }
1563
1564 static ir_node *expression_to_addr(const expression_t *expression)
1565 {
1566         switch(expression->type) {
1567         case EXPR_REFERENCE:
1568                 return reference_addr((const reference_expression_t*) expression);
1569         case EXPR_ARRAY_ACCESS:
1570                 return array_access_addr((const array_access_expression_t*) expression);
1571         case EXPR_SELECT:
1572                 return select_addr((const select_expression_t*) expression);
1573         case EXPR_UNARY: {
1574                 const unary_expression_t *const unary_expr =
1575                         (const unary_expression_t*)expression;
1576                 if (unary_expr->type == UNEXPR_DEREFERENCE) {
1577                         return dereference_addr(unary_expr);
1578                 }
1579                 break;
1580         }
1581         default:
1582                 break;
1583         }
1584         panic("trying to get address of non-lvalue");
1585 }
1586
1587 static ir_node *_expression_to_firm(const expression_t *expression)
1588 {
1589         switch(expression->type) {
1590         case EXPR_CONST:
1591                 return const_to_firm((const const_t*) expression);
1592         case EXPR_STRING_LITERAL:
1593                 return string_literal_to_firm((const string_literal_t*) expression);
1594         case EXPR_REFERENCE:
1595                 return reference_expression_to_firm(
1596                                 (const reference_expression_t*) expression);
1597         case EXPR_CALL:
1598                 return call_expression_to_firm((const call_expression_t*) expression);
1599         case EXPR_UNARY:
1600                 return unary_expression_to_firm((const unary_expression_t*) expression);
1601         case EXPR_BINARY:
1602                 return binary_expression_to_firm(
1603                                 (const binary_expression_t*) expression);
1604         case EXPR_ARRAY_ACCESS:
1605                 return array_access_to_firm(
1606                                 (const array_access_expression_t*) expression);
1607         case EXPR_SIZEOF:
1608                 return sizeof_to_firm((const sizeof_expression_t*) expression);
1609         case EXPR_CONDITIONAL:
1610                 return conditional_to_firm((const conditional_expression_t*)expression);
1611         case EXPR_SELECT:
1612                 return select_to_firm((const select_expression_t*) expression);
1613         case EXPR_CLASSIFY_TYPE:
1614                 return classify_type_to_firm((const classify_type_expression_t*)expression);
1615         case EXPR_FUNCTION:
1616         case EXPR_PRETTY_FUNCTION:
1617                 return function_name_to_firm((const string_literal_t*)expression);
1618         case EXPR_STATEMENT:
1619                 return statement_expression_to_firm(
1620                                 (const statement_expression_t*) expression);
1621         case EXPR_OFFSETOF:
1622         case EXPR_VA_ARG:
1623         case EXPR_BUILTIN_SYMBOL:
1624                 panic("unimplemented expression found");
1625
1626         case EXPR_UNKNOWN:
1627         case EXPR_INVALID:
1628                 break;
1629         }
1630         panic("invalid expression found");
1631 }
1632
1633 static ir_node *expression_to_firm(const expression_t *expression)
1634 {
1635         ir_node *res = _expression_to_firm(expression);
1636
1637         if(res != NULL && get_irn_mode(res) == mode_b) {
1638                 ir_mode *mode = get_ir_mode(expression->datatype);
1639                 res           = create_conv(NULL, res, mode);
1640         }
1641
1642         return res;
1643 }
1644
1645 static ir_node *expression_to_modeb(const expression_t *expression)
1646 {
1647         ir_node *res = _expression_to_firm(expression);
1648         res          = create_conv(NULL, res, mode_b);
1649
1650         return res;
1651 }
1652
1653 /**
1654  * create a short-circuit expression evaluation that tries to construct
1655  * efficient control flow structures for &&, || and ! expressions
1656  */
1657 static void create_condition_evaluation(const expression_t *expression,
1658                                         ir_node *true_block,
1659                                         ir_node *false_block)
1660 {
1661         switch(expression->type) {
1662         case EXPR_UNARY: {
1663                 unary_expression_t *unary_expression = (unary_expression_t*) expression;
1664                 if(unary_expression->type == UNEXPR_NOT) {
1665                         create_condition_evaluation(unary_expression->value, false_block,
1666                                                     true_block);
1667                         return;
1668                 }
1669                 break;
1670         }
1671         case EXPR_BINARY: {
1672                 binary_expression_t *binary_expression
1673                         = (binary_expression_t*) expression;
1674                 if(binary_expression->type == BINEXPR_LOGICAL_AND) {
1675                         ir_node *cur_block   = get_cur_block();
1676                         ir_node *extra_block = new_immBlock();
1677                         set_cur_block(cur_block);
1678                         create_condition_evaluation(binary_expression->left, extra_block,
1679                                                     false_block);
1680                         mature_immBlock(extra_block);
1681                         set_cur_block(extra_block);
1682                         create_condition_evaluation(binary_expression->right, true_block,
1683                                                     false_block);
1684                         return;
1685                 }
1686                 if(binary_expression->type == BINEXPR_LOGICAL_OR) {
1687                         ir_node *cur_block   = get_cur_block();
1688                         ir_node *extra_block = new_immBlock();
1689                         set_cur_block(cur_block);
1690                         create_condition_evaluation(binary_expression->left, true_block,
1691                                                     extra_block);
1692                         mature_immBlock(extra_block);
1693                         set_cur_block(extra_block);
1694                         create_condition_evaluation(binary_expression->right, true_block,
1695                                                     false_block);
1696                         return;
1697                 }
1698                 break;
1699         }
1700         default:
1701                 break;
1702         }
1703
1704         dbg_info *dbgi       = get_dbg_info(&expression->source_position);
1705         ir_node  *condition  = expression_to_modeb(expression);
1706         ir_node  *cond       = new_d_Cond(dbgi, condition);
1707         ir_node  *true_proj  = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
1708         ir_node  *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
1709
1710         add_immBlock_pred(true_block, true_proj);
1711         add_immBlock_pred(false_block, false_proj);
1712
1713         set_cur_block(NULL);
1714 }
1715
1716
1717 static void return_statement_to_firm(return_statement_t *statement)
1718 {
1719         if(get_cur_block() == NULL)
1720                 return;
1721
1722         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
1723         ir_node  *ret;
1724
1725         if(statement->return_value != NULL) {
1726                 ir_node *retval = expression_to_firm(statement->return_value);
1727                 ir_node *in[1];
1728
1729                 in[0] = retval;
1730                 ret   = new_d_Return(dbgi, get_store(), 1, in);
1731         } else {
1732                 ret   = new_d_Return(dbgi, get_store(), 0, NULL);
1733         }
1734         ir_node *end_block = get_irg_end_block(current_ir_graph);
1735         add_immBlock_pred(end_block, ret);
1736
1737         set_cur_block(NULL);
1738 }
1739
1740 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
1741 {
1742         if(get_cur_block() == NULL)
1743                 return NULL;
1744
1745         return expression_to_firm(statement->expression);
1746 }
1747
1748 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
1749 {
1750         ir_node     *result    = NULL;
1751         statement_t *statement = compound->statements;
1752         for( ; statement != NULL; statement = statement->next) {
1753                 //context2firm(&statement->context);
1754
1755                 if(statement->next == NULL && statement->type == STATEMENT_EXPRESSION) {
1756                         result = expression_statement_to_firm(
1757                                         (expression_statement_t*) statement);
1758                         break;
1759                 }
1760                 statement_to_firm(statement);
1761         }
1762
1763         return result;
1764 }
1765
1766 static void if_statement_to_firm(if_statement_t *statement)
1767 {
1768         ir_node *cur_block = get_cur_block();
1769
1770         ir_node *fallthrough_block = new_immBlock();
1771
1772         /* the true (blocks) */
1773         ir_node *true_block;
1774         if (statement->true_statement != NULL) {
1775                 true_block = new_immBlock();
1776                 statement_to_firm(statement->true_statement);
1777                 if(get_cur_block() != NULL) {
1778                         ir_node *jmp = new_Jmp();
1779                         add_immBlock_pred(fallthrough_block, jmp);
1780                 }
1781         } else {
1782                 true_block = fallthrough_block;
1783         }
1784
1785         /* the false (blocks) */
1786         ir_node *false_block;
1787         if(statement->false_statement != NULL) {
1788                 false_block = new_immBlock();
1789
1790                 statement_to_firm(statement->false_statement);
1791                 if(get_cur_block() != NULL) {
1792                         ir_node *jmp = new_Jmp();
1793                         add_immBlock_pred(fallthrough_block, jmp);
1794                 }
1795         } else {
1796                 false_block = fallthrough_block;
1797         }
1798
1799         /* create the condition */
1800         if(cur_block != NULL) {
1801                 set_cur_block(cur_block);
1802                 create_condition_evaluation(statement->condition, true_block,
1803                                             false_block);
1804         }
1805
1806         mature_immBlock(true_block);
1807         if(false_block != fallthrough_block) {
1808                 mature_immBlock(false_block);
1809         }
1810         mature_immBlock(fallthrough_block);
1811
1812         set_cur_block(fallthrough_block);
1813 }
1814
1815 static void while_statement_to_firm(while_statement_t *statement)
1816 {
1817         ir_node *jmp = NULL;
1818         if(get_cur_block() != NULL) {
1819                 jmp = new_Jmp();
1820         }
1821
1822         /* create the header block */
1823         ir_node *header_block = new_immBlock();
1824         if(jmp != NULL) {
1825                 add_immBlock_pred(header_block, jmp);
1826         }
1827
1828         /* the false block */
1829         ir_node *false_block = new_immBlock();
1830
1831         /* the loop body */
1832         ir_node *body_block;
1833         if (statement->body != NULL) {
1834                 ir_node *old_continue_label = continue_label;
1835                 ir_node *old_break_label    = break_label;
1836                 continue_label              = header_block;
1837                 break_label                 = false_block;
1838
1839                 body_block = new_immBlock();
1840                 statement_to_firm(statement->body);
1841
1842                 assert(continue_label == header_block);
1843                 assert(break_label    == false_block);
1844                 continue_label = old_continue_label;
1845                 break_label    = old_break_label;
1846
1847                 if(get_cur_block() != NULL) {
1848                         ir_node *jmp = new_Jmp();
1849                         add_immBlock_pred(header_block, jmp);
1850                 }
1851         } else {
1852                 body_block = header_block;
1853         }
1854
1855         /* create the condition */
1856         set_cur_block(header_block);
1857
1858         create_condition_evaluation(statement->condition, body_block, false_block);
1859         mature_immBlock(body_block);
1860         mature_immBlock(false_block);
1861         mature_immBlock(header_block);
1862
1863         set_cur_block(false_block);
1864 }
1865
1866 static void do_while_statement_to_firm(do_while_statement_t *statement)
1867 {
1868         ir_node *jmp = NULL;
1869         if(get_cur_block() != NULL) {
1870                 jmp = new_Jmp();
1871         }
1872
1873         /* create the header block */
1874         ir_node *header_block = new_immBlock();
1875
1876         /* the false block */
1877         ir_node *false_block = new_immBlock();
1878
1879         /* the loop body */
1880         ir_node *body_block = new_immBlock();
1881         if(jmp != NULL) {
1882                 add_immBlock_pred(body_block, jmp);
1883         }
1884
1885         if (statement->body != NULL) {
1886                 ir_node *old_continue_label = continue_label;
1887                 ir_node *old_break_label    = break_label;
1888                 continue_label              = header_block;
1889                 break_label                 = false_block;
1890
1891                 statement_to_firm(statement->body);
1892
1893                 assert(continue_label == header_block);
1894                 assert(break_label    == false_block);
1895                 continue_label = old_continue_label;
1896                 break_label    = old_break_label;
1897
1898                 if (get_cur_block() == NULL) {
1899                         mature_immBlock(header_block);
1900                         mature_immBlock(body_block);
1901                         mature_immBlock(false_block);
1902                         return;
1903                 }
1904         }
1905
1906         ir_node *body_jmp = new_Jmp();
1907         add_immBlock_pred(header_block, body_jmp);
1908         mature_immBlock(header_block);
1909
1910         /* create the condition */
1911         set_cur_block(header_block);
1912
1913         create_condition_evaluation(statement->condition, body_block, false_block);
1914         mature_immBlock(body_block);
1915         mature_immBlock(false_block);
1916         mature_immBlock(header_block);
1917
1918         set_cur_block(false_block);
1919 }
1920
1921 static void for_statement_to_firm(for_statement_t *statement)
1922 {
1923         ir_node *jmp = NULL;
1924         if (get_cur_block() != NULL) {
1925                 if(statement->initialisation != NULL) {
1926                         expression_to_firm(statement->initialisation);
1927                 }
1928                 jmp = new_Jmp();
1929         }
1930
1931         /* create the step block */
1932         ir_node *const step_block = new_immBlock();
1933         if (statement->step != NULL) {
1934                 expression_to_firm(statement->step);
1935         }
1936         ir_node *const step_jmp = new_Jmp();
1937
1938         /* create the header block */
1939         ir_node *const header_block = new_immBlock();
1940         if (jmp != NULL) {
1941                 add_immBlock_pred(header_block, jmp);
1942         }
1943         add_immBlock_pred(header_block, step_jmp);
1944
1945         /* the false block */
1946         ir_node *const false_block = new_immBlock();
1947
1948         /* the loop body */
1949         ir_node * body_block;
1950         if (statement->body != NULL) {
1951                 ir_node *const old_continue_label = continue_label;
1952                 ir_node *const old_break_label    = break_label;
1953                 continue_label = step_block;
1954                 break_label    = false_block;
1955
1956                 body_block = new_immBlock();
1957                 statement_to_firm(statement->body);
1958
1959                 assert(continue_label == step_block);
1960                 assert(break_label    == false_block);
1961                 continue_label = old_continue_label;
1962                 break_label    = old_break_label;
1963
1964                 if (get_cur_block() != NULL) {
1965                         ir_node *const jmp = new_Jmp();
1966                         add_immBlock_pred(step_block, jmp);
1967                 }
1968         } else {
1969                 body_block = step_block;
1970         }
1971
1972         /* create the condition */
1973         set_cur_block(header_block);
1974         if (statement->condition != NULL) {
1975                 create_condition_evaluation(statement->condition, body_block,
1976                                             false_block);
1977         } else {
1978                 keep_alive(header_block);
1979                 ir_node *jmp = new_Jmp();
1980                 add_immBlock_pred(body_block, jmp);
1981         }
1982
1983         mature_immBlock(body_block);
1984         mature_immBlock(false_block);
1985         mature_immBlock(step_block);
1986         mature_immBlock(header_block);
1987         mature_immBlock(false_block);
1988
1989         set_cur_block(false_block);
1990 }
1991
1992 static void create_declaration_entity(declaration_t *declaration,
1993                                       declaration_type_t declaration_type,
1994                                       ir_type *parent_type)
1995 {
1996         ident     *id     = new_id_from_str(declaration->symbol->string);
1997         ir_type   *irtype = get_ir_type(declaration->type);
1998         ir_entity *entity = new_entity(parent_type, id, irtype);
1999         set_entity_ld_ident(entity, id);
2000
2001         declaration->declaration_type = declaration_type;
2002         declaration->v.entity         = entity;
2003         set_entity_variability(entity, variability_uninitialized);
2004         /* TODO: visibility? */
2005 }
2006
2007 typedef struct compound_graph_path_entry_t compound_graph_path_entry_t;
2008
2009 enum compound_graph_entry_type_t {
2010         COMPOUND_GRAPH_ENTRY_ARRAY,
2011         COMPOUND_GRAPH_ENTRY_COMPOUND
2012 };
2013
2014 struct compound_graph_path_entry_t {
2015         int type;
2016         union {
2017                 ir_entity *entity;
2018                 int        array_index;
2019         } v;
2020         compound_graph_path_entry_t *prev;
2021 };
2022
2023 static void create_initializer_list(initializer_list_t *initializer,
2024                                     type_t *type, ir_entity *entity,
2025                                     compound_graph_path_entry_t *entry,
2026                                     int len);
2027
2028 static void create_initializer_value(initializer_value_t *initializer,
2029                                      ir_entity *entity,
2030                                      compound_graph_path_entry_t *entry,
2031                                      int len)
2032 {
2033         ir_node *node = expression_to_firm(initializer->value);
2034
2035         ir_type *type = get_entity_type(entity);
2036         compound_graph_path *path = new_compound_graph_path(type, len);
2037
2038         int i = len - 1;
2039         for( ; entry != NULL; entry = entry->prev, --i) {
2040                 assert(i >= 0);
2041                 if(entry->type == COMPOUND_GRAPH_ENTRY_COMPOUND) {
2042                         set_compound_graph_path_node(path, i, entry->v.entity);
2043                 } else {
2044                         assert(entry->type == COMPOUND_GRAPH_ENTRY_ARRAY);
2045                         set_compound_graph_path_array_index(path, i, entry->v.array_index);
2046                 }
2047         }
2048         assert(i == -1);
2049
2050         add_compound_ent_value_w_path(entity, node, path);
2051 }
2052
2053 static void create_initializer_compound(initializer_list_t *initializer,
2054                                         compound_type_t *type,
2055                                         ir_entity *entity,
2056                                         compound_graph_path_entry_t *last_entry,
2057                                         int len)
2058 {
2059         declaration_t *compound_declaration = type->declaration;
2060
2061         declaration_t *compound_entry = compound_declaration->context.declarations;
2062
2063         compound_graph_path_entry_t entry;
2064         entry.type = COMPOUND_GRAPH_ENTRY_COMPOUND;
2065         entry.prev = last_entry;
2066         ++len;
2067
2068         size_t i = 0;
2069         for( ; compound_entry != NULL; compound_entry = compound_entry->next) {
2070                 if(compound_entry->symbol == NULL)
2071                         continue;
2072                 if(compound_entry->namespc != NAMESPACE_NORMAL)
2073                         continue;
2074
2075                 if(i >= initializer->len)
2076                         break;
2077
2078                 entry.v.entity = compound_entry->v.entity;
2079
2080                 initializer_t *sub_initializer = initializer->initializers[i];
2081
2082                 assert(compound_entry != NULL);
2083                 assert(compound_entry->declaration_type
2084                                 == DECLARATION_TYPE_COMPOUND_MEMBER);
2085
2086                 if(sub_initializer->type == INITIALIZER_VALUE) {
2087                         create_initializer_value((initializer_value_t*) sub_initializer,
2088                                                  entity, &entry, len);
2089                 } else {
2090                         assert(sub_initializer->type == INITIALIZER_LIST);
2091                         type_t *type = skip_typeref(compound_entry->type);
2092                         create_initializer_list((initializer_list_t*) sub_initializer,
2093                                                 type, entity, &entry, len);
2094                 }
2095
2096                 ++i;
2097         }
2098 }
2099
2100 static void create_initializer_array(initializer_list_t *initializer,
2101                                      array_type_t *type, ir_entity *entity,
2102                                      compound_graph_path_entry_t *last_entry,
2103                                      int len)
2104 {
2105         type_t *element_type = type->element_type;
2106         element_type         = skip_typeref(element_type);
2107
2108         compound_graph_path_entry_t entry;
2109         entry.type = COMPOUND_GRAPH_ENTRY_ARRAY;
2110         entry.prev = last_entry;
2111         ++len;
2112
2113         for(size_t i = 0; i < initializer->len; ++i) {
2114                 entry.v.array_index = i;
2115
2116                 initializer_t *sub_initializer = initializer->initializers[i];
2117
2118                 if(sub_initializer->type == INITIALIZER_VALUE) {
2119                         create_initializer_value((initializer_value_t*) sub_initializer,
2120                                                  entity, &entry, len);
2121                 } else {
2122                         assert(sub_initializer->type == INITIALIZER_LIST);
2123                         create_initializer_list((initializer_list_t*) sub_initializer,
2124                                                 element_type, entity, &entry, len);
2125                 }
2126         }
2127 }
2128
2129 static void create_initializer_list(initializer_list_t *initializer,
2130                                     type_t *type, ir_entity *entity,
2131                                     compound_graph_path_entry_t *entry, int len)
2132 {
2133         if(type->type == TYPE_ARRAY) {
2134                 create_initializer_array(initializer, (array_type_t*) type,
2135                                          entity, entry, len);
2136         } else {
2137                 assert(type->type == TYPE_COMPOUND_STRUCT
2138                                 || type->type == TYPE_COMPOUND_UNION);
2139                 create_initializer_compound(initializer, (compound_type_t*) type,
2140                                             entity, entry, len);
2141         }
2142 }
2143
2144 static void create_initializer(declaration_t *declaration)
2145 {
2146         initializer_t *initializer = declaration->init.initializer;
2147         if(initializer == NULL)
2148                 return;
2149
2150         if(initializer->type == INITIALIZER_VALUE) {
2151                 initializer_value_t *initializer_value
2152                         = (initializer_value_t*) initializer;
2153                 ir_node *value = expression_to_firm(initializer_value->value);
2154
2155                 declaration_type_t declaration_type = declaration->declaration_type;
2156                 if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE) {
2157                         set_value(declaration->v.value_number, value);
2158                 } else if(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY) {
2159                         ir_entity *entity    = declaration->v.entity;
2160                         dbg_info  *dbgi      = get_dbg_info(&declaration->source_position);
2161                         ir_node   *frame     = get_irg_frame(current_ir_graph);
2162                         ir_node   *addr      = new_d_simpleSel(dbgi, new_NoMem(), frame,
2163                                                entity);
2164                         ir_node   *memory    = get_store();
2165                         ir_node   *store     = new_d_Store(dbgi, memory, addr, value);
2166                         ir_node   *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
2167                         set_store(store_mem);
2168                 } else {
2169                         assert(declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2170
2171                         ir_entity *entity = declaration->v.entity;
2172
2173                         set_entity_variability(entity, variability_initialized);
2174                         set_atomic_ent_value(entity, value);
2175                 }
2176         } else {
2177                 assert(initializer->type == INITIALIZER_LIST);
2178                 initializer_list_t *list = (initializer_list_t*) initializer;
2179
2180                 declaration_type_t declaration_type = declaration->declaration_type;
2181                 assert(declaration_type == DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY
2182                                 || declaration_type == DECLARATION_TYPE_GLOBAL_VARIABLE);
2183
2184                 ir_entity *entity = declaration->v.entity;
2185                 set_entity_variability(entity, variability_initialized);
2186
2187                 type_t *type = skip_typeref(declaration->type);
2188                 create_initializer_list(list, type, entity, NULL, 0);
2189         }
2190 }
2191
2192 static void create_local_variable(declaration_t *declaration)
2193 {
2194         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2195
2196         bool needs_entity = declaration->address_taken;
2197         type_t *type = skip_typeref(declaration->type);
2198
2199         if(type->type == TYPE_ARRAY
2200                         || type->type == TYPE_COMPOUND_STRUCT
2201                         || type->type == TYPE_COMPOUND_UNION) {
2202                 needs_entity = true;
2203         }
2204
2205         if(needs_entity) {
2206                 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2207                 create_declaration_entity(declaration,
2208                                           DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY,
2209                                           frame_type);
2210         } else {
2211                 declaration->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2212                 declaration->v.value_number   = next_value_number_function;
2213                 ++next_value_number_function;
2214         }
2215
2216         create_initializer(declaration);
2217 }
2218
2219 static void create_local_static_variable(declaration_t *declaration)
2220 {
2221         assert(declaration->declaration_type == DECLARATION_TYPE_UNKNOWN);
2222
2223         type_t    *type        = skip_typeref(declaration->type);
2224         ir_type   *global_type = get_glob_type();
2225         ident     *id          = unique_ident(declaration->symbol->string);
2226         ir_type   *irtype      = get_ir_type(type);
2227         ir_entity *entity      = new_entity(global_type, id, irtype);
2228         set_entity_ld_ident(entity, id);
2229
2230         declaration->declaration_type = DECLARATION_TYPE_GLOBAL_VARIABLE;
2231         declaration->v.entity         = entity;
2232         set_entity_variability(entity, variability_uninitialized);
2233         set_entity_visibility(entity, visibility_local);
2234
2235         create_initializer(declaration);
2236 }
2237
2238 static void declaration_statement_to_firm(declaration_statement_t *statement)
2239 {
2240         declaration_t *declaration = statement->declarations_begin;
2241         declaration_t *end         = statement->declarations_end->next;
2242         for( ; declaration != end; declaration = declaration->next) {
2243                 type_t *type = declaration->type;
2244
2245                 switch(declaration->storage_class) {
2246                 case STORAGE_CLASS_TYPEDEF:
2247                         continue;
2248                 case STORAGE_CLASS_STATIC:
2249                         create_local_static_variable(declaration);
2250                         continue;
2251                 case STORAGE_CLASS_ENUM_ENTRY:
2252                         panic("enum entry declaration in local block found");
2253                 case STORAGE_CLASS_EXTERN:
2254                         panic("extern declaration in local block found");
2255                 case STORAGE_CLASS_NONE:
2256                 case STORAGE_CLASS_AUTO:
2257                 case STORAGE_CLASS_REGISTER:
2258                         if(type->type == TYPE_FUNCTION) {
2259                                 panic("nested functions not supported yet");
2260                         } else {
2261                                 create_local_variable(declaration);
2262                         }
2263                         continue;
2264                 }
2265                 panic("invalid storage class found");
2266         }
2267 }
2268
2269 static void create_jump_statement(const statement_t *statement,
2270                                   ir_node *target_block)
2271 {
2272         if(get_cur_block() == NULL)
2273                 return;
2274
2275         dbg_info *dbgi = get_dbg_info(&statement->source_position);
2276         ir_node  *jump = new_d_Jmp(dbgi);
2277         add_immBlock_pred(target_block, jump);
2278
2279         set_cur_block(NULL);
2280 }
2281
2282 static void switch_statement_to_firm(const switch_statement_t *statement)
2283 {
2284         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2285
2286         ir_node *expression  = expression_to_firm(statement->expression);
2287         ir_node *cond        = new_d_Cond(dbgi, expression);
2288         ir_node *break_block = new_immBlock();
2289
2290         set_cur_block(NULL);
2291
2292         ir_node *const old_switch_cond       = current_switch_cond;
2293         ir_node *const old_break_label       = break_label;
2294         const bool     old_saw_default_label = saw_default_label;
2295         current_switch_cond                  = cond;
2296         break_label                          = break_block;
2297
2298         statement_to_firm(statement->body);
2299
2300         if(get_cur_block() != NULL) {
2301                 ir_node *jmp = new_Jmp();
2302                 add_immBlock_pred(break_block, jmp);
2303         }
2304
2305         if (!saw_default_label) {
2306                 set_cur_block(get_nodes_block(cond));
2307                 ir_node *const proj = new_d_defaultProj(dbgi, cond,
2308                                                         MAGIC_DEFAULT_PN_NUMBER);
2309                 add_immBlock_pred(break_block, proj);
2310         }
2311
2312         assert(current_switch_cond == cond);
2313         assert(break_label         == break_block);
2314         current_switch_cond = old_switch_cond;
2315         break_label         = old_break_label;
2316         saw_default_label   = old_saw_default_label;
2317
2318         mature_immBlock(break_block);
2319         set_cur_block(break_block);
2320 }
2321
2322 static long fold_constant(const expression_t *expression)
2323 {
2324         ir_graph *old_current_ir_graph = current_ir_graph;
2325         current_ir_graph = get_const_code_irg();
2326
2327         ir_node *cnst = expression_to_firm(expression);
2328         if(!is_Const(cnst)) {
2329                 panic("couldn't fold constantl");
2330         }
2331         tarval *tv = get_Const_tarval(cnst);
2332         if(!tarval_is_long(tv)) {
2333                 panic("folded constant not an integer");
2334         }
2335
2336         long res = get_tarval_long(tv);
2337
2338         current_ir_graph = old_current_ir_graph;
2339         return res;
2340 }
2341
2342 static void case_label_to_firm(const case_label_statement_t *statement)
2343 {
2344         dbg_info *dbgi = get_dbg_info(&statement->statement.source_position);
2345
2346         ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
2347
2348         /* let's create a node and hope firm constant folding creates a Const
2349          * node... */
2350         ir_node *proj;
2351         set_cur_block(get_nodes_block(current_switch_cond));
2352         if(statement->expression) {
2353                 long pn = fold_constant(statement->expression);
2354                 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
2355                         /* oops someone detected our cheating... */
2356                         panic("magic default pn used");
2357                 }
2358                 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
2359         } else {
2360                 saw_default_label = true;
2361                 proj = new_d_defaultProj(dbgi, current_switch_cond,
2362                                          MAGIC_DEFAULT_PN_NUMBER);
2363         }
2364
2365         ir_node *block = new_immBlock();
2366         if (fallthrough != NULL) {
2367                 add_immBlock_pred(block, fallthrough);
2368         }
2369         add_immBlock_pred(block, proj);
2370         mature_immBlock(block);
2371
2372         statement_to_firm(statement->label_statement);
2373 }
2374
2375 static ir_node *get_label_block(declaration_t *label)
2376 {
2377         assert(label->namespc == NAMESPACE_LABEL);
2378
2379         if(label->declaration_type == DECLARATION_TYPE_LABEL_BLOCK) {
2380                 return label->v.block;
2381         }
2382         assert(label->declaration_type == DECLARATION_TYPE_UNKNOWN);
2383
2384         ir_node *old_cur_block = get_cur_block();
2385         ir_node *block         = new_immBlock();
2386         set_cur_block(old_cur_block);
2387
2388         label->declaration_type = DECLARATION_TYPE_LABEL_BLOCK;
2389         label->v.block          = block;
2390
2391         ARR_APP1(ir_node *, imature_blocks, block);
2392
2393         return block;
2394 }
2395
2396 static void label_to_firm(const label_statement_t *statement)
2397 {
2398         ir_node *block = get_label_block(statement->label);
2399
2400         if(get_cur_block() != NULL) {
2401                 ir_node *jmp = new_Jmp();
2402                 add_immBlock_pred(block, jmp);
2403         }
2404
2405         set_cur_block(block);
2406         keep_alive(block);
2407
2408         statement_to_firm(statement->label_statement);
2409 }
2410
2411 static void goto_to_firm(const goto_statement_t *statement)
2412 {
2413         if(get_cur_block() == NULL)
2414                 return;
2415
2416         ir_node *block = get_label_block(statement->label);
2417         ir_node *jmp   = new_Jmp();
2418         add_immBlock_pred(block, jmp);
2419
2420         set_cur_block(NULL);
2421 }
2422
2423 static void statement_to_firm(statement_t *statement)
2424 {
2425         switch(statement->type) {
2426         case STATEMENT_COMPOUND:
2427                 compound_statement_to_firm((compound_statement_t*) statement);
2428                 return;
2429         case STATEMENT_RETURN:
2430                 return_statement_to_firm((return_statement_t*) statement);
2431                 return;
2432         case STATEMENT_EXPRESSION:
2433                 expression_statement_to_firm((expression_statement_t*) statement);
2434                 return;
2435         case STATEMENT_IF:
2436                 if_statement_to_firm((if_statement_t*) statement);
2437                 return;
2438         case STATEMENT_WHILE:
2439                 while_statement_to_firm((while_statement_t*) statement);
2440                 return;
2441         case STATEMENT_DO_WHILE:
2442                 do_while_statement_to_firm((do_while_statement_t*) statement);
2443                 return;
2444         case STATEMENT_DECLARATION:
2445                 declaration_statement_to_firm((declaration_statement_t*) statement);
2446                 return;
2447         case STATEMENT_BREAK:
2448                 create_jump_statement(statement, break_label);
2449                 return;
2450         case STATEMENT_CONTINUE:
2451                 create_jump_statement(statement, continue_label);
2452                 return;
2453         case STATEMENT_SWITCH:
2454                 switch_statement_to_firm((switch_statement_t*) statement);
2455                 return;
2456         case STATEMENT_CASE_LABEL:
2457                 case_label_to_firm((case_label_statement_t*) statement);
2458                 return;
2459         case STATEMENT_FOR:
2460                 for_statement_to_firm((for_statement_t*) statement);
2461                 return;
2462         case STATEMENT_LABEL:
2463                 label_to_firm((label_statement_t*) statement);
2464                 return;
2465         case STATEMENT_GOTO:
2466                 goto_to_firm((goto_statement_t*) statement);
2467                 return;
2468         default:
2469                 break;
2470         }
2471         panic("Statement not implemented\n");
2472 }
2473
2474 static int count_local_declarations(const declaration_t *      decl,
2475                                     const declaration_t *const end)
2476 {
2477         int count = 0;
2478         for (; decl != end; decl = decl->next) {
2479                 const type_t *type = skip_typeref(decl->type);
2480                 switch (type->type) {
2481                         case TYPE_ATOMIC:
2482                         case TYPE_ENUM:
2483                         case TYPE_POINTER:
2484                                 if (!decl->address_taken) ++count;
2485                                 break;
2486
2487                         default: break;
2488                 }
2489         }
2490         return count;
2491 }
2492
2493 static int count_decls_in_stmts(const statement_t *stmt)
2494 {
2495         int count = 0;
2496         for (; stmt != NULL; stmt = stmt->next) {
2497                 switch (stmt->type) {
2498                         case STATEMENT_DECLARATION: {
2499                                 const declaration_statement_t *const decl_stmt =
2500                                         (const declaration_statement_t*)stmt;
2501                                 count += count_local_declarations(decl_stmt->declarations_begin,
2502                                                                   decl_stmt->declarations_end->next);
2503                                 break;
2504                         }
2505
2506                         case STATEMENT_COMPOUND: {
2507                                 const compound_statement_t *const comp =
2508                                         (const compound_statement_t*)stmt;
2509                                 count += count_decls_in_stmts(comp->statements);
2510                                 break;
2511                         }
2512
2513                         case STATEMENT_IF: {
2514                                 const if_statement_t *const if_stmt = (const if_statement_t*)stmt;
2515                                 count += count_decls_in_stmts(if_stmt->true_statement);
2516                                 count += count_decls_in_stmts(if_stmt->false_statement);
2517                                 break;
2518                         }
2519
2520                         case STATEMENT_SWITCH: {
2521                                 const switch_statement_t *const switch_stmt =
2522                                         (const switch_statement_t*)stmt;
2523                                 count += count_decls_in_stmts(switch_stmt->body);
2524                                 break;
2525                         }
2526
2527                         case STATEMENT_LABEL: {
2528                                 const label_statement_t *const label_stmt =
2529                                         (const label_statement_t*)stmt;
2530                                 count += count_decls_in_stmts(label_stmt->label_statement);
2531                                 break;
2532                         }
2533
2534                         case STATEMENT_WHILE: {
2535                                 const while_statement_t *const while_stmt =
2536                                         (const while_statement_t*)stmt;
2537                                 count += count_decls_in_stmts(while_stmt->body);
2538                                 break;
2539                         }
2540
2541                         case STATEMENT_DO_WHILE: {
2542                                 const do_while_statement_t *const do_while_stmt =
2543                                         (const do_while_statement_t*)stmt;
2544                                 count += count_decls_in_stmts(do_while_stmt->body);
2545                                 break;
2546                         }
2547
2548                         case STATEMENT_FOR: {
2549                                 const for_statement_t *const for_stmt =
2550                                         (const for_statement_t*)stmt;
2551                                 /* TODO initialisation */
2552                                 count += count_decls_in_stmts(for_stmt->body);
2553                                 break;
2554                         }
2555
2556                         case STATEMENT_BREAK:
2557                         case STATEMENT_CASE_LABEL:
2558                         case STATEMENT_CONTINUE:
2559                         case STATEMENT_EXPRESSION:
2560                         case STATEMENT_GOTO:
2561                         case STATEMENT_INVALID:
2562                         case STATEMENT_RETURN:
2563                                 break;
2564                 }
2565         }
2566         return count;
2567 }
2568
2569 static int get_function_n_local_vars(declaration_t *declaration)
2570 {
2571         int count = 0;
2572
2573         /* count parameters */
2574         count += count_local_declarations(declaration->context.declarations, NULL);
2575
2576         /* count local variables declared in body */
2577         count += count_decls_in_stmts(declaration->init.statement);
2578
2579         /* TODO FIXME: Matze: I'm lazy don't want to scan all expressions
2580          * for expression statements... */
2581         count += 10;
2582
2583         return count;
2584 }
2585
2586 static void initialize_function_parameters(declaration_t *declaration)
2587 {
2588         ir_graph        *irg             = current_ir_graph;
2589         ir_node         *args            = get_irg_args(irg);
2590         ir_node         *start_block     = get_irg_start_block(irg);
2591         ir_type         *function_irtype = get_ir_type(declaration->type);
2592
2593         int            n         = 0;
2594         declaration_t *parameter = declaration->context.declarations;
2595         for( ; parameter != NULL; parameter = parameter->next, ++n) {
2596                 assert(parameter->declaration_type == DECLARATION_TYPE_UNKNOWN);
2597                 type_t *type = skip_typeref(parameter->type);
2598
2599                 bool needs_entity = parameter->address_taken;
2600                 if(type->type == TYPE_COMPOUND_STRUCT
2601                                 || type->type == TYPE_COMPOUND_UNION) {
2602                         needs_entity = true;
2603                 }
2604
2605                 if(needs_entity) {
2606                         ir_entity *entity = get_method_value_param_ent(function_irtype, n);
2607                         ident     *id     = new_id_from_str(parameter->symbol->string);
2608                         set_entity_ident(entity, id);
2609
2610                         parameter->declaration_type
2611                                 = DECLARATION_TYPE_LOCAL_VARIABLE_ENTITY;
2612                         parameter->v.entity = entity;
2613                         continue;
2614                 }
2615
2616                 ir_mode *mode = get_ir_mode(parameter->type);
2617                 long     pn   = n;
2618                 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
2619
2620                 parameter->declaration_type = DECLARATION_TYPE_LOCAL_VARIABLE;
2621                 parameter->v.value_number   = next_value_number_function;
2622                 ++next_value_number_function;
2623
2624                 set_value(parameter->v.value_number, proj);
2625         }
2626 }
2627
2628 static void create_function(declaration_t *declaration)
2629 {
2630         ir_entity *entity = get_function_entity(declaration);
2631
2632         if(declaration->init.statement == NULL)
2633                 return;
2634
2635         current_function_decl = declaration;
2636         current_function_name = NULL;
2637
2638         assert(imature_blocks == NULL);
2639         imature_blocks = NEW_ARR_F(ir_node*, 0);
2640
2641         int       n_local_vars = get_function_n_local_vars(declaration);
2642         ir_graph *irg          = new_ir_graph(entity, n_local_vars);
2643         ir_node  *first_block  = get_cur_block();
2644
2645         next_value_number_function = 0;
2646         initialize_function_parameters(declaration);
2647
2648         statement_to_firm(declaration->init.statement);
2649
2650         ir_node *end_block = get_irg_end_block(irg);
2651
2652         /* do we have a return statement yet? */
2653         if(get_cur_block() != NULL) {
2654                 assert(declaration->type->type == TYPE_FUNCTION);
2655                 const function_type_t* const func_type
2656                         = (const function_type_t*) declaration->type;
2657                 ir_node *ret;
2658                 if (func_type->result_type == type_void) {
2659                         ret = new_Return(get_store(), 0, NULL);
2660                 } else {
2661                         ir_mode *const mode = get_ir_mode(func_type->result_type);
2662                         ir_node *      in[1];
2663                         // §5.1.2.2.3 main implicitly returns 0
2664                         if (strcmp(declaration->symbol->string, "main") == 0) {
2665                                 in[0] = new_Const(mode, get_mode_null(mode));
2666                         } else {
2667                                 in[0] = new_Unknown(mode);
2668                         }
2669                         ret = new_Return(get_store(), 1, in);
2670                 }
2671                 add_immBlock_pred(end_block, ret);
2672         }
2673
2674         for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
2675                 mature_immBlock(imature_blocks[i]);
2676         }
2677         DEL_ARR_F(imature_blocks);
2678         imature_blocks = NULL;
2679
2680         mature_immBlock(first_block);
2681         mature_immBlock(end_block);
2682
2683         irg_finalize_cons(irg);
2684
2685         /* finalize the frame type */
2686         ir_type *frame_type = get_irg_frame_type(irg);
2687         int      n          = get_compound_n_members(frame_type);
2688         int      align_all  = 4;
2689         int      offset     = 0;
2690         for(int i = 0; i < n; ++i) {
2691                 ir_entity *entity      = get_compound_member(frame_type, i);
2692                 ir_type   *entity_type = get_entity_type(entity);
2693
2694                 int align = get_type_alignment_bytes(entity_type);
2695                 if(align > align_all)
2696                         align_all = align;
2697                 int misalign = 0;
2698                 if(align > 0) {
2699                         misalign  = offset % align;
2700                         if(misalign > 0) {
2701                                 offset += align - misalign;
2702                         }
2703                 }
2704
2705                 set_entity_offset(entity, offset);
2706                 offset += get_type_size_bytes(entity_type);
2707         }
2708         set_type_size_bytes(frame_type, offset);
2709         set_type_alignment_bytes(frame_type, align_all);
2710         set_type_state(frame_type, layout_fixed);
2711
2712         irg_vrfy(irg);
2713 }
2714
2715 static void create_global_variable(declaration_t *declaration)
2716 {
2717         ir_type   *global_type = get_glob_type();
2718         create_declaration_entity(declaration, DECLARATION_TYPE_GLOBAL_VARIABLE,
2719                                   global_type);
2720
2721         ir_entity *entity = declaration->v.entity;
2722         if(declaration->storage_class == STORAGE_CLASS_STATIC) {
2723                 set_entity_visibility(entity, visibility_local);
2724         } else if(declaration->storage_class == STORAGE_CLASS_EXTERN) {
2725                 set_entity_visibility(entity, visibility_external_allocated);
2726         } else {
2727                 set_entity_visibility(entity, visibility_external_visible);
2728         }
2729         current_ir_graph = get_const_code_irg();
2730         create_initializer(declaration);
2731 }
2732
2733 static void context_to_firm(context_t *context)
2734 {
2735         /* first pass: create declarations */
2736         declaration_t *declaration = context->declarations;
2737         for( ; declaration != NULL; declaration = declaration->next) {
2738                 if(declaration->namespc != NAMESPACE_NORMAL)
2739                         continue;
2740                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2741                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2742                         continue;
2743                 if(declaration->symbol == NULL)
2744                         continue;
2745
2746                 type_t *type = declaration->type;
2747                 if(type->type == TYPE_FUNCTION) {
2748                         get_function_entity(declaration);
2749                 } else {
2750                         create_global_variable(declaration);
2751                 }
2752         }
2753
2754         /* second pass: create code */
2755         declaration = context->declarations;
2756         for( ; declaration != NULL; declaration = declaration->next) {
2757                 if(declaration->namespc != NAMESPACE_NORMAL)
2758                         continue;
2759                 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
2760                                 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
2761                         continue;
2762                 if(declaration->symbol == NULL)
2763                         continue;
2764
2765                 type_t *type = declaration->type;
2766                 if(type->type != TYPE_FUNCTION)
2767                         continue;
2768
2769                 create_function(declaration);
2770         }
2771 }
2772
2773 void translation_unit_to_firm(translation_unit_t *unit)
2774 {
2775         /* just to be sure */
2776         continue_label      = NULL;
2777         break_label         = NULL;
2778         current_switch_cond = NULL;
2779
2780         context_to_firm(& unit->context);
2781 }